Table 2 Baseline sample characteristics of follow-up responders and non-responders

WAI, mean (SD)

38.7 (7.0)

37.2 (7.8)

< 0.001

WAI

Good or excellent, %

68.7

60.4

0.001

Poor or moderate, %

31.3

39.6

Gender: female, %

33.6

34.1

0.835

Age, mean (SD)

51.0 (4.0)

51.2 (4.3)

0.306

Low educational level, %

33.2

37.1

0.119

White-collar worker, %

97.8

96.8

0.226

Exercise: at least two hours per week, %

54.5

51.8

0.288

BMI ≥ 25, %

57.2

60.4

0.216

Smoking, %

19.6

23.9

0.045

Health-related behaviour (0–3), mean (SD)

1.7 (0.9)

1.6 (0.9)

0.301

Physical demands (0–12), mean (SD)

1.1 (1.7)

1.5 (2.2)

< 0.001

Psychological job demands (0–4), mean (SD)

1.5 (0.9)

1.5 (1.0)

0.528

Job control (0–4), mean (SD)

3.2 (0.7)

3.1 (0.7)

0.091

Effort (5–25), mean (SD)

14.8 (4.4)

15.1 (4.6)

0.229

Reward (11–55), mean (SD)

44.3 (8.7)

43.3 (8.8)

0.026

ER ratio, mean (SD)

0.8 (0.4)

0.8 (0.4)

0.083

ERI: ER ratio > 1, %

23.7

29.0

0.022